Both James I and Charles I had conflicts with Parliament due to disagreements over the powers and privileges of the monarchy and the legislature.
James I believed in the "divine right of kings," which held that monarchs were chosen by God and were therefore not subject to the will of the people or the laws made by Parliament. This led to tensions between James I and Parliament over issues such as taxation and foreign policy.
Charles I continued his father's beliefs in the divine right of kings, which led to even more conflict with Parliament. He believed that he had the power to rule without the need for Parliamentary approval, which led to clashes over issues such as taxation, religious policy, and the rights of the people.
Parliament saw itself as representing the interests of the people and believed that it had the right to limit the powers of the monarchy and protect the liberties of the people. These conflicts eventually led to a civil war between the Royalists, who supported the monarchy, and the Parliamentarians, who believed in limiting the power of the monarch and expanding the powers of Parliament.